Blown Head Gasket

What is your question?

I have a used 98 ford taurus with under 90,000 miles on it and after blowing white smoke and spewing fluids everywhere i looked at the engine oil dipstick and discovered a thick caramely milk. after looking up why the smoke was coming out i found a blown head gasket.. can anybody tell me how much it would cost to have it done? i realize to do it myself will take a lot of time and help..